Multifunctional Metal-C-Fiber-Polymer-Laminates (MCFRP): Modeling and property analysis for damage tolerant, conductive and monitorable lightweight structures

创新的、高性能的运输系统结构必须满足多重且往往相互冲突的要求。它们必须表现出低质量、高承载能力和高损伤容忍度。在两个研究项目的范围内，制造了碳纤维和金属纤维混杂层板(MCFRP)，在一个复合材料中结合了多种功能。可以证明，局部集中的钢纤维层提高了损伤容限和导电性。此外，亚稳奥氏体钢纤维的集成使得磁性传感器能够应用于非接触评估和监测由于亚稳态钢纤维的变形诱导相变而产生的加载结构。基于这些基本发现，现在将提出更多的应用问题，以调查这种新的杂化材料的局限性和前景。必须定义合适的模拟模型，并通过实验验证其基本的力学和电学特性。此外，还计划在适用于机身材料的典型极限范围内，在低温和高温下对混合层板进行详细的疲劳试验和冲击试验。最后，通过多功能类属结构单元的设计和实验表征对新的发现和模型进行了验证。

Multiple and often conflicting requirements have to be fulfilled by innovative, high-performance structures of transportation systems. They must demonstrate low mass, high load bearing capability and high damage tolerance. Within the scope of two research projects , hybrid laminates with carbon fibers and metal fibers (MCFRP) were manufactured, combining multiple functions within one composite. It could be demonstrated that locally concentrated layers of steel fibers improve damage tolerance as well as electrical conductivity. In addition, it was shown that the integration of metastable austenitic steel fibers enables the application of magnetic sensors for contact-less assessment and monitoring of loaded structures due to deformation-induced phase transformation of the metastable steel fibers. Based on these fundamental findings, more applied questions will be now adressed in order to investigate the limits and prospects of the new hybrid material. Suitable simulation models have to defined and experimentally verified for the fundamental mechanical as well as electrical laminate properties. In addition, detailed fatigue experiments and impact tests of hybrid laminates are planned at low and high temperatures within the typical limits applied to airframe materials. Finally, the new findings and models are verified by the design and experimental characterization of a multifunctional generic structural element.